3a thread class right-hand 0.380" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.378" thread length flat countersunk head style 0.365" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.225" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
Used on spec item. 3a thread class right-hand 0.626" thread length hexagon head style 5.923" grip length 20 thread quantity per inch cadmium surface treated unf thread series